Alain Robert

Alain Robert is a talented rock climber born on August 7, 1962, nicknamed Spiderman.
The diminutive Frenchmen is famous for the solo
ascent of skyscrapers or buildering (a pun on bouldering).
He uses no safety equipment; all he
takes with him is a chalk bag and his climbing shoes. It's usually
a race to get to the top before the local police figure out what he's doing
and try to stop him. Robert has climbed more than 50 buildings.
Here are some of them1:

1. These ascents are all documented but that's not the case
for all of the climbs claimed for him in the media.
There is some doubt about, for instance, whether he really did climb the
Empire State Building in 1994.
He has a website now alainrobert.com